./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/gcd_1+newton_3_1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b53b322-39dd-4ace-bb9b-1d40b2b29540/bin/uautomizer-ZXIjhQolGL/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b53b322-39dd-4ace-bb9b-1d40b2b29540/bin/uautomizer-ZXIjhQolGL/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b53b322-39dd-4ace-bb9b-1d40b2b29540/bin/uautomizer-ZXIjhQolGL/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b53b322-39dd-4ace-bb9b-1d40b2b29540/bin/uautomizer-ZXIjhQolGL/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/gcd_1+newton_3_1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b53b322-39dd-4ace-bb9b-1d40b2b29540/bin/uautomizer-ZXIjhQolGL/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b53b322-39dd-4ace-bb9b-1d40b2b29540/bin/uautomizer-ZXIjhQolGL --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 353cc018d334cc7a981957992a6877492a13119a8e3524540eab203ce1072cbf --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 04:40:01,808 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 04:40:01,811 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 04:40:01,847 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 04:40:01,848 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 04:40:01,849 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 04:40:01,852 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 04:40:01,854 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 04:40:01,857 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 04:40:01,858 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 04:40:01,860 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 04:40:01,861 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 04:40:01,862 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 04:40:01,866 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 04:40:01,868 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 04:40:01,870 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 04:40:01,871 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 04:40:01,873 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 04:40:01,876 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 04:40:01,879 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 04:40:01,881 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 04:40:01,883 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 04:40:01,885 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 04:40:01,886 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 04:40:01,891 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 04:40:01,892 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 04:40:01,892 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 04:40:01,894 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 04:40:01,895 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 04:40:01,896 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 04:40:01,897 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 04:40:01,898 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 04:40:01,899 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 04:40:01,901 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 04:40:01,902 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 04:40:01,903 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 04:40:01,904 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 04:40:01,905 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 04:40:01,905 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 04:40:01,907 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 04:40:01,908 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 04:40:01,909 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b53b322-39dd-4ace-bb9b-1d40b2b29540/bin/uautomizer-ZXIjhQolGL/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-19 04:40:01,943 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 04:40:01,943 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 04:40:01,943 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-19 04:40:01,944 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-19 04:40:01,945 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 04:40:01,945 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 04:40:01,946 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-19 04:40:01,946 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-19 04:40:01,946 INFO L138 SettingsManager]: * Use SBE=true [2021-11-19 04:40:01,947 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 04:40:01,947 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 04:40:01,947 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 04:40:01,948 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 04:40:01,948 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 04:40:01,948 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 04:40:01,948 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 04:40:01,949 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 04:40:01,949 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 04:40:01,949 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 04:40:01,950 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 04:40:01,950 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 04:40:01,950 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 04:40:01,956 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 04:40:01,957 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 04:40:01,957 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 04:40:01,958 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 04:40:01,958 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 04:40:01,958 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 04:40:01,959 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-19 04:40:01,962 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 04:40:01,962 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-19 04:40:01,962 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-19 04:40:01,963 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 04:40:01,963 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 04:40:01,963 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b53b322-39dd-4ace-bb9b-1d40b2b29540/bin/uautomizer-ZXIjhQolGL/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b53b322-39dd-4ace-bb9b-1d40b2b29540/bin/uautomizer-ZXIjhQolGL Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 353cc018d334cc7a981957992a6877492a13119a8e3524540eab203ce1072cbf [2021-11-19 04:40:02,301 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 04:40:02,342 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 04:40:02,345 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 04:40:02,347 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 04:40:02,347 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 04:40:02,350 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b53b322-39dd-4ace-bb9b-1d40b2b29540/bin/uautomizer-ZXIjhQolGL/../../sv-benchmarks/c/combinations/gcd_1+newton_3_1.i [2021-11-19 04:40:02,431 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b53b322-39dd-4ace-bb9b-1d40b2b29540/bin/uautomizer-ZXIjhQolGL/data/261357400/6a4e9f67790745ef8ab7f33072ef3e5c/FLAGfcf589ffd [2021-11-19 04:40:03,019 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 04:40:03,020 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b53b322-39dd-4ace-bb9b-1d40b2b29540/sv-benchmarks/c/combinations/gcd_1+newton_3_1.i [2021-11-19 04:40:03,034 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b53b322-39dd-4ace-bb9b-1d40b2b29540/bin/uautomizer-ZXIjhQolGL/data/261357400/6a4e9f67790745ef8ab7f33072ef3e5c/FLAGfcf589ffd [2021-11-19 04:40:03,320 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b53b322-39dd-4ace-bb9b-1d40b2b29540/bin/uautomizer-ZXIjhQolGL/data/261357400/6a4e9f67790745ef8ab7f33072ef3e5c [2021-11-19 04:40:03,325 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 04:40:03,330 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 04:40:03,334 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 04:40:03,334 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 04:40:03,337 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 04:40:03,338 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:40:03" (1/1) ... [2021-11-19 04:40:03,339 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d6df46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:40:03, skipping insertion in model container [2021-11-19 04:40:03,340 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:40:03" (1/1) ... [2021-11-19 04:40:03,349 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 04:40:03,372 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 04:40:03,580 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b53b322-39dd-4ace-bb9b-1d40b2b29540/sv-benchmarks/c/combinations/gcd_1+newton_3_1.i[1226,1239] [2021-11-19 04:40:03,615 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b53b322-39dd-4ace-bb9b-1d40b2b29540/sv-benchmarks/c/combinations/gcd_1+newton_3_1.i[2828,2841] [2021-11-19 04:40:03,617 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 04:40:03,635 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 04:40:03,662 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b53b322-39dd-4ace-bb9b-1d40b2b29540/sv-benchmarks/c/combinations/gcd_1+newton_3_1.i[1226,1239] [2021-11-19 04:40:03,676 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b53b322-39dd-4ace-bb9b-1d40b2b29540/sv-benchmarks/c/combinations/gcd_1+newton_3_1.i[2828,2841] [2021-11-19 04:40:03,677 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 04:40:03,696 INFO L208 MainTranslator]: Completed translation [2021-11-19 04:40:03,696 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:40:03 WrapperNode [2021-11-19 04:40:03,696 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 04:40:03,698 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 04:40:03,698 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 04:40:03,698 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 04:40:03,705 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:40:03" (1/1) ... [2021-11-19 04:40:03,715 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:40:03" (1/1) ... [2021-11-19 04:40:03,744 INFO L137 Inliner]: procedures = 27, calls = 18, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 82 [2021-11-19 04:40:03,745 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 04:40:03,746 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 04:40:03,746 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 04:40:03,746 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 04:40:03,756 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:40:03" (1/1) ... [2021-11-19 04:40:03,756 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:40:03" (1/1) ... [2021-11-19 04:40:03,759 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:40:03" (1/1) ... [2021-11-19 04:40:03,760 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:40:03" (1/1) ... [2021-11-19 04:40:03,768 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:40:03" (1/1) ... [2021-11-19 04:40:03,773 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:40:03" (1/1) ... [2021-11-19 04:40:03,784 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:40:03" (1/1) ... [2021-11-19 04:40:03,787 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 04:40:03,793 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 04:40:03,793 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 04:40:03,799 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 04:40:03,800 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:40:03" (1/1) ... [2021-11-19 04:40:03,807 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 04:40:03,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b53b322-39dd-4ace-bb9b-1d40b2b29540/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:40:03,832 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b53b322-39dd-4ace-bb9b-1d40b2b29540/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 04:40:03,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b53b322-39dd-4ace-bb9b-1d40b2b29540/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 04:40:03,880 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 04:40:03,880 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2021-11-19 04:40:03,880 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2021-11-19 04:40:03,880 INFO L130 BoogieDeclarations]: Found specification of procedure f [2021-11-19 04:40:03,881 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2021-11-19 04:40:03,881 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-19 04:40:03,881 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 04:40:03,881 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 04:40:03,975 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 04:40:03,977 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 04:40:04,237 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 04:40:04,245 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 04:40:04,246 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-19 04:40:04,248 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:40:04 BoogieIcfgContainer [2021-11-19 04:40:04,248 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 04:40:04,267 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 04:40:04,268 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 04:40:04,274 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 04:40:04,275 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:40:03" (1/3) ... [2021-11-19 04:40:04,275 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a87285f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:40:04, skipping insertion in model container [2021-11-19 04:40:04,276 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:40:03" (2/3) ... [2021-11-19 04:40:04,276 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a87285f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:40:04, skipping insertion in model container [2021-11-19 04:40:04,276 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:40:04" (3/3) ... [2021-11-19 04:40:04,278 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd_1+newton_3_1.i [2021-11-19 04:40:04,284 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 04:40:04,284 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-19 04:40:04,340 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 04:40:04,357 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-19 04:40:04,364 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-19 04:40:04,398 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 31 states have internal predecessors, (40), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-19 04:40:04,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-19 04:40:04,407 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:40:04,407 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:40:04,409 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:40:04,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:40:04,425 INFO L85 PathProgramCache]: Analyzing trace with hash -247750664, now seen corresponding path program 1 times [2021-11-19 04:40:04,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:40:04,440 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45351350] [2021-11-19 04:40:04,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:40:04,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:40:04,584 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:40:04,585 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1361958784] [2021-11-19 04:40:04,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:40:04,586 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:40:04,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b53b322-39dd-4ace-bb9b-1d40b2b29540/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:40:04,589 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b53b322-39dd-4ace-bb9b-1d40b2b29540/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:40:04,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b53b322-39dd-4ace-bb9b-1d40b2b29540/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-19 04:40:04,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:40:04,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-19 04:40:04,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:40:04,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:40:04,799 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 04:40:04,800 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:40:04,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45351350] [2021-11-19 04:40:04,802 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:40:04,803 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361958784] [2021-11-19 04:40:04,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361958784] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:40:04,805 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:40:04,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-19 04:40:04,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100450384] [2021-11-19 04:40:04,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:40:04,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-19 04:40:04,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:40:04,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-19 04:40:04,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 04:40:04,866 INFO L87 Difference]: Start difference. First operand has 40 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 31 states have internal predecessors, (40), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:40:04,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:40:04,907 INFO L93 Difference]: Finished difference Result 72 states and 89 transitions. [2021-11-19 04:40:04,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-19 04:40:04,910 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-19 04:40:04,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:40:04,918 INFO L225 Difference]: With dead ends: 72 [2021-11-19 04:40:04,919 INFO L226 Difference]: Without dead ends: 32 [2021-11-19 04:40:04,922 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 04:40:04,933 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:40:04,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:40:04,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-19 04:40:05,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-11-19 04:40:05,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-19 04:40:05,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2021-11-19 04:40:05,008 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 11 [2021-11-19 04:40:05,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:40:05,009 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2021-11-19 04:40:05,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:40:05,009 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2021-11-19 04:40:05,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-19 04:40:05,013 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:40:05,013 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:40:05,060 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b53b322-39dd-4ace-bb9b-1d40b2b29540/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-19 04:40:05,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b53b322-39dd-4ace-bb9b-1d40b2b29540/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-11-19 04:40:05,239 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:40:05,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:40:05,241 INFO L85 PathProgramCache]: Analyzing trace with hash -251444748, now seen corresponding path program 1 times [2021-11-19 04:40:05,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:40:05,242 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543863984] [2021-11-19 04:40:05,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:40:05,243 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:40:05,258 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:40:05,258 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [48676371] [2021-11-19 04:40:05,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:40:05,266 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:40:05,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b53b322-39dd-4ace-bb9b-1d40b2b29540/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:40:05,269 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b53b322-39dd-4ace-bb9b-1d40b2b29540/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:40:05,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b53b322-39dd-4ace-bb9b-1d40b2b29540/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-19 04:40:05,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:40:05,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 04:40:05,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:40:05,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:40:05,421 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 04:40:05,422 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:40:05,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543863984] [2021-11-19 04:40:05,422 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:40:05,423 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48676371] [2021-11-19 04:40:05,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48676371] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:40:05,423 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:40:05,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 04:40:05,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750672725] [2021-11-19 04:40:05,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:40:05,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 04:40:05,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:40:05,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 04:40:05,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:40:05,427 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:40:05,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:40:05,452 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2021-11-19 04:40:05,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 04:40:05,456 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-19 04:40:05,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:40:05,459 INFO L225 Difference]: With dead ends: 39 [2021-11-19 04:40:05,459 INFO L226 Difference]: Without dead ends: 33 [2021-11-19 04:40:05,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:40:05,462 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 2 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:40:05,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 66 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:40:05,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-11-19 04:40:05,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-11-19 04:40:05,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 24 states have internal predecessors, (26), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-19 04:40:05,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2021-11-19 04:40:05,488 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 11 [2021-11-19 04:40:05,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:40:05,489 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2021-11-19 04:40:05,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:40:05,489 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2021-11-19 04:40:05,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-19 04:40:05,490 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:40:05,490 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:40:05,528 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b53b322-39dd-4ace-bb9b-1d40b2b29540/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-19 04:40:05,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b53b322-39dd-4ace-bb9b-1d40b2b29540/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:40:05,691 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:40:05,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:40:05,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1673157840, now seen corresponding path program 1 times [2021-11-19 04:40:05,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:40:05,693 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164003373] [2021-11-19 04:40:05,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:40:05,693 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:40:05,705 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:40:05,706 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1290621339] [2021-11-19 04:40:05,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:40:05,706 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:40:05,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b53b322-39dd-4ace-bb9b-1d40b2b29540/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:40:05,713 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b53b322-39dd-4ace-bb9b-1d40b2b29540/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:40:05,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b53b322-39dd-4ace-bb9b-1d40b2b29540/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-19 04:40:05,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:40:05,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-19 04:40:05,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:40:05,951 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:40:05,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:40:06,027 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:40:06,028 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:40:06,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164003373] [2021-11-19 04:40:06,029 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:40:06,029 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290621339] [2021-11-19 04:40:06,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290621339] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:40:06,029 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:40:06,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-11-19 04:40:06,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342502876] [2021-11-19 04:40:06,030 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:40:06,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 04:40:06,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:40:06,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 04:40:06,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-19 04:40:06,034 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:40:06,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:40:06,149 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2021-11-19 04:40:06,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 04:40:06,150 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-19 04:40:06,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:40:06,152 INFO L225 Difference]: With dead ends: 39 [2021-11-19 04:40:06,155 INFO L226 Difference]: Without dead ends: 34 [2021-11-19 04:40:06,156 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-19 04:40:06,159 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 4 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:40:06,162 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 153 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:40:06,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-11-19 04:40:06,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-11-19 04:40:06,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 24 states have (on average 1.125) internal successors, (27), 25 states have internal predecessors, (27), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-19 04:40:06,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2021-11-19 04:40:06,178 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 12 [2021-11-19 04:40:06,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:40:06,182 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2021-11-19 04:40:06,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:40:06,183 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2021-11-19 04:40:06,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-19 04:40:06,186 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:40:06,186 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:40:06,232 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b53b322-39dd-4ace-bb9b-1d40b2b29540/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-19 04:40:06,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b53b322-39dd-4ace-bb9b-1d40b2b29540/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:40:06,411 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:40:06,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:40:06,412 INFO L85 PathProgramCache]: Analyzing trace with hash -276630798, now seen corresponding path program 2 times [2021-11-19 04:40:06,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:40:06,412 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149981877] [2021-11-19 04:40:06,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:40:06,413 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:40:06,420 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:40:06,420 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1502728235] [2021-11-19 04:40:06,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 04:40:06,421 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:40:06,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b53b322-39dd-4ace-bb9b-1d40b2b29540/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:40:06,422 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b53b322-39dd-4ace-bb9b-1d40b2b29540/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:40:06,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b53b322-39dd-4ace-bb9b-1d40b2b29540/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-19 04:40:13,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 04:40:13,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:40:13,759 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-19 04:40:13,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:43:59,738 WARN L838 $PredicateComparison]: unable to prove that (and (not (= |c_ULTIMATE.start_gcd_test_~a#1| 0)) (exists ((|v_ULTIMATE.start_gcd_test_~a#1_12| Int) (|v_ULTIMATE.start_gcd_test_~a#1_14| Int)) (and (< 0 |v_ULTIMATE.start_gcd_test_~a#1_14|) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_12|)) (= (mod |v_ULTIMATE.start_gcd_test_~a#1_12| |v_ULTIMATE.start_gcd_test_~a#1_14|) 0) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_14| |c_ULTIMATE.start_gcd_test_~a#1|) 256)) (= (mod (mod (mod (* |v_ULTIMATE.start_gcd_test_~a#1_12| 255) 256) |v_ULTIMATE.start_gcd_test_~a#1_14|) 256) |c_ULTIMATE.start_gcd_test_~a#1|) (< |v_ULTIMATE.start_gcd_test_~a#1_12| 0)))) is different from false [2021-11-19 04:44:40,947 WARN L838 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_gcd_test_~a#1_12| Int) (|v_ULTIMATE.start_gcd_test_~a#1_14| Int)) (and (< 0 |v_ULTIMATE.start_gcd_test_~a#1_14|) (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_14| |c_ULTIMATE.start_gcd_test_~a#1|) 256) 0) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_12|)) (= (mod |v_ULTIMATE.start_gcd_test_~a#1_12| |v_ULTIMATE.start_gcd_test_~a#1_14|) 0) (= (mod (mod (mod (* |v_ULTIMATE.start_gcd_test_~a#1_12| 255) 256) |v_ULTIMATE.start_gcd_test_~a#1_14|) 256) |c_ULTIMATE.start_gcd_test_~a#1|) (< |v_ULTIMATE.start_gcd_test_~a#1_12| 0))) (not (= |c_ULTIMATE.start_gcd_test_~a#1| 0))) is different from false [2021-11-19 04:45:35,447 WARN L838 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_gcd_test_~a#1_12| Int) (|v_ULTIMATE.start_gcd_test_~a#1_14| Int)) (let ((.cse0 (mod (mod (mod (* |v_ULTIMATE.start_gcd_test_~a#1_12| 255) 256) |v_ULTIMATE.start_gcd_test_~a#1_14|) 256))) (and (not (= .cse0 0)) (= 0 (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_14| .cse0) 256)) (= .cse0 |c_ULTIMATE.start_gcd_test_#res#1|) (< 0 |v_ULTIMATE.start_gcd_test_~a#1_14|) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_12|)) (= (mod |v_ULTIMATE.start_gcd_test_~a#1_12| |v_ULTIMATE.start_gcd_test_~a#1_14|) 0) (< |v_ULTIMATE.start_gcd_test_~a#1_12| 0)))) is different from false [2021-11-19 04:46:15,008 WARN L838 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_gcd_test_~a#1_12| Int) (|v_ULTIMATE.start_gcd_test_~a#1_14| Int)) (and (not (= (mod (mod (mod (* |v_ULTIMATE.start_gcd_test_~a#1_12| 255) 256) |v_ULTIMATE.start_gcd_test_~a#1_14|) 256) 0)) (< 0 |v_ULTIMATE.start_gcd_test_~a#1_14|) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_12|)) (= (mod |v_ULTIMATE.start_gcd_test_~a#1_12| |v_ULTIMATE.start_gcd_test_~a#1_14|) 0) (< |v_ULTIMATE.start_gcd_test_~a#1_12| 0))) is different from false [2021-11-19 04:46:17,011 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_gcd_test_~a#1_12| Int) (|v_ULTIMATE.start_gcd_test_~a#1_14| Int)) (and (not (= (mod (mod (mod (* |v_ULTIMATE.start_gcd_test_~a#1_12| 255) 256) |v_ULTIMATE.start_gcd_test_~a#1_14|) 256) 0)) (< 0 |v_ULTIMATE.start_gcd_test_~a#1_14|) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_12|)) (= (mod |v_ULTIMATE.start_gcd_test_~a#1_12| |v_ULTIMATE.start_gcd_test_~a#1_14|) 0) (< |v_ULTIMATE.start_gcd_test_~a#1_12| 0))) is different from true [2021-11-19 04:46:44,199 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2021-11-19 04:46:44,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:49:52,027 WARN L227 SmtUtils]: Spent 2.50m on a formula simplification. DAG size of input: 114 DAG size of output: 112 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 04:50:17,716 WARN L227 SmtUtils]: Spent 16.52s on a formula simplification. DAG size of input: 64 DAG size of output: 60 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 04:51:41,566 WARN L227 SmtUtils]: Spent 28.05s on a formula simplification that was a NOOP. DAG size: 38 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 04:52:04,050 WARN L227 SmtUtils]: Spent 5.30s on a formula simplification. DAG size of input: 7 DAG size of output: 1 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-19 04:53:04,168 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main1_~y~0#1_6| Int) (|v_ULTIMATE.start_main1_~x~0#1_5| Int)) (let ((.cse0 (mod (mod (mod (* |v_ULTIMATE.start_main1_~x~0#1_5| 255) 256) |v_ULTIMATE.start_main1_~y~0#1_6|) 256))) (or (not (= 0 (mod |v_ULTIMATE.start_main1_~x~0#1_5| |v_ULTIMATE.start_main1_~y~0#1_6|))) (not (= (mod (mod |v_ULTIMATE.start_main1_~y~0#1_6| .cse0) 256) 0)) (= .cse0 0) (<= 0 |v_ULTIMATE.start_main1_~x~0#1_5|) (< (+ 128 |v_ULTIMATE.start_main1_~x~0#1_5|) 0) (<= |v_ULTIMATE.start_main1_~y~0#1_6| 0)))) is different from false [2021-11-19 04:53:06,172 WARN L860 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main1_~y~0#1_6| Int) (|v_ULTIMATE.start_main1_~x~0#1_5| Int)) (let ((.cse0 (mod (mod (mod (* |v_ULTIMATE.start_main1_~x~0#1_5| 255) 256) |v_ULTIMATE.start_main1_~y~0#1_6|) 256))) (or (not (= 0 (mod |v_ULTIMATE.start_main1_~x~0#1_5| |v_ULTIMATE.start_main1_~y~0#1_6|))) (not (= (mod (mod |v_ULTIMATE.start_main1_~y~0#1_6| .cse0) 256) 0)) (= .cse0 0) (<= 0 |v_ULTIMATE.start_main1_~x~0#1_5|) (< (+ 128 |v_ULTIMATE.start_main1_~x~0#1_5|) 0) (<= |v_ULTIMATE.start_main1_~y~0#1_6| 0)))) is different from true [2021-11-19 04:53:47,063 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:53:47,063 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:53:47,064 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149981877] [2021-11-19 04:53:47,064 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:53:47,064 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502728235] [2021-11-19 04:53:47,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502728235] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:53:47,064 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:53:47,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 19 [2021-11-19 04:53:47,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498559939] [2021-11-19 04:53:47,065 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:53:47,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-19 04:53:47,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:53:47,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-19 04:53:47,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=137, Unknown=22, NotChecked=140, Total=342 [2021-11-19 04:53:47,066 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:53:49,073 WARN L838 $PredicateComparison]: unable to prove that (and (or (let ((.cse1 (mod (* |c_ULTIMATE.start_main1_~x~0#1| 255) 256))) (and (let ((.cse0 (mod (mod .cse1 |c_ULTIMATE.start_main1_~y~0#1|) 256))) (or (= .cse0 0) (< 127 .cse1) (not (= (mod (mod |c_ULTIMATE.start_main1_~y~0#1| .cse0) 256) 0)))) (let ((.cse2 (mod (+ (- 256) .cse1) |c_ULTIMATE.start_main1_~y~0#1|))) (or (<= .cse1 127) (not (= (mod (mod |c_ULTIMATE.start_main1_~y~0#1| (+ (mod (+ (* |c_ULTIMATE.start_main1_~y~0#1| 255) .cse2) 256) (- 256))) 256) 0)) (= .cse2 0))))) (not (= (mod |c_ULTIMATE.start_main1_~x~0#1| |c_ULTIMATE.start_main1_~y~0#1|) 0)) (<= 0 |c_ULTIMATE.start_main1_~x~0#1|) (<= |c_ULTIMATE.start_main1_~y~0#1| 0)) (<= |c_ULTIMATE.start_main1_~x~0#1| 127) (<= 0 (+ |c_ULTIMATE.start_main1_~x~0#1| 128)) (<= |c_ULTIMATE.start_main1_~y~0#1| 127)) is different from false